Question

Here are the approximate populations of three countries, expressed in scientific notation: Panama: 4 × 10 6 ; Peru: 3.2 × 10 7 ; Thailand: 7 × 10 7.
Decide what power of 10 to put on the label for the rightmost tick mark of this number line so that all three countries’ populations can be distinguished.

Answer 1

Using scientific notation, the power of 10 that should be put on the label is of $10^7$, hence x = 7.

What is scientific notation?

A number in scientific notation is given by:

$a \times 10^b$

With the base being $a \in [1, 10)$.

In this problem, we don't want to increase the base values much. Panama's population can be represented as:

$4 \times 10^6 = 0.4 \times 10^7$

Hence, the power of 10 that should be put on the label is of $10^7$, hence x = 7.

More can be learned about scientific notation at brainly.com/question/16394306

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